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单项选择题

The greatest benefit one can get from exercise is when ______.

A．the workout involve various jumps
B．one does not use an elevator but climbs stairs
C．one walks to run most of the errands
D．one switches from being inactive to active
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单项选择题Who served in the Second World War

A．Bill Clinton and Bob Dole.
B．Bob Dole and George Herbert Walker Bush.
C．George Herbert Walker Bush.
D．George Herbert Walker Bush and Bill Clinton.

单项选择题Which of the following may count as deliberate workout

A．Housework.
B．Lawn-mowing.
C．Table tennis.
D．Out-of-the-gym activities.

单项选择题Which of the following statements about the monument is NOT TRUE

A．The monument is situated in Washington D. C..
B．One of the arches represents the Atlantic theater of the war.
C．Each of the gold stars sands for an American soldier killed in the war.
D．The inscription says these people sacrificed their lives for freedom.

单项选择题It seems that physical activities inevitably ______, which improves fitness.

A．burn calories
B．build muscles
C．relieve back pains
D．reduce high blood pressure

单项选择题Cardiovascular exercise helps ______.

A．one to work more efficiently
B．to promote a strong heart
C．to lose weight
D．one to sleep better